/*
  The oSIP library implements the Session Initiation Protocol (SIP -rfc3261-)
  Copyright (C) 2001,2002,2003,2004,2005,2006,2007 Aymeric MOIZARD jack@atosc.org
  
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
  
  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.
  
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include <osip2/internal.h>
#include <osip2/osip.h>

#include "fsm.h"
#include "xixt.h"

int __osip_nist_init(osip_nist_t ** nist, osip_t * osip, osip_message_t * invite)
{
	int i;

	OSIP_TRACE(osip_trace
			   (__FILE__, __LINE__, OSIP_INFO2, NULL,
				"allocating NIST context\n"));

	*nist = (osip_nist_t *) osip_malloc(sizeof(osip_nist_t));
	if (*nist == NULL)
		return OSIP_NOMEM;
	memset(*nist, 0, sizeof(osip_nist_t));
	/* for INVITE retransmissions */
	{
		osip_via_t *via;
		char *proto;

		i = osip_message_get_via(invite, 0, &via);	/* get top via */
		if (i < 0) {
			osip_free(*nist);
			*nist = NULL;
			return i;
		}
		proto = via_get_protocol(via);
		if (proto == NULL) {
			osip_free(*nist);
			*nist = NULL;
			return OSIP_UNDEFINED_ERROR;
		}

		if (osip_strcasecmp(proto, "TCP") != 0
			&& osip_strcasecmp(proto, "TLS") != 0
			&& osip_strcasecmp(proto, "SCTP") != 0) {
			(*nist)->timer_j_length = 64 * DEFAULT_T1;
			(*nist)->timer_j_start.tv_sec = -1;	/* not started */
		} else {				/* reliable protocol is used: */
			(*nist)->timer_j_length = 0;	/* MUST do the transition immediatly */
			(*nist)->timer_j_start.tv_sec = -1;	/* not started */
		}
	}

	return OSIP_SUCCESS;
}

int __osip_nist_free(osip_nist_t * nist)
{
	if (nist == NULL)
		return OSIP_SUCCESS;
	OSIP_TRACE(osip_trace
			   (__FILE__, __LINE__, OSIP_INFO2, NULL, "free nist ressource\n"));

	osip_free(nist);
	return OSIP_SUCCESS;
}



osip_event_t *__osip_nist_need_timer_j_event(osip_nist_t * nist, state_t state,
											 int transactionid)
{
	return __osip_transaction_need_timer_x_event(nist, &nist->timer_j_start,
												 state == NIST_COMPLETED,
												 transactionid, TIMEOUT_J);
}
